分布式电源接入对配电网故障定位及电压质量的影响分析  

Influence of Distributed Generation on Fault Location and Voltage Quality of Distribution Network

作　　者：刘健[1] 张志华[1] 黄炜[2] 魏昊焜 

机构地区：[1]陕西电力科学研究院,西安市710054 [2]西安科技大学电控学院,西安市710054 [3]西安理工大学自动化学院,西安市710048

出　　处：《电力建设》2015年第1期115-121,共7页Electric Power Construction

基　　金：国家电网公司科技项目(提高配电网故障处理能力的关键技术研究)(5226SX13044H)

摘　　要：为了解决分布式电源(distributed generation,DG)接入情况下对配电网故障定位及电压质量的影响,分析了各种类型分布式电源对短路电流的影响,得出了依靠故障电流分布进行故障定位的传统配电自动化系统的适应范围,提出了一种利用重合闸与分布式电源脱网特性协调配合的改进故障处理策略,以应对更大规模分布式电源接入的挑战。分析了分布式电源接入配电网后对电压偏差和电压波动的影响,提出了一种获得不必进行控制就能满足电压质量要求的判断条件,对于不符合该判断条件的分布式电源可以通过配电自动化系统进行监控以满足电压质量的要求。实例表明所建议的方法是可行的。To solve the influence of distributed generation （DG） on the fault location and voltage quality of distribution network, the influence of various DGs on the short-circuit current were analyzed. The adaptation range of traditional distribution automation system was obtained, in which the fault location was based on the fault current distribution. An improved fault process strategy was proposed to meet the requirement of much larger amount of DGs connection, based on the coordination of the reclosing procedure and DG escaping after faults. The influences of DGs on the voltage deviation and voltage fluctuation of distribution network were analyzed. The judging condition to meet the requirements of voltage quality without the control of DG was proposed. The DG that could not accord with the judging condition could be monitored by distribution automation system to meet the requirements of voltage quality. The examples show that the proposed method is feasible.

关 键 词：配电网 配电自动化系统 分布式电源(DG) 故障定位 电压偏差 电压波动 

分 类 号：TM72[电气工程—电力系统及自动化]